This is most troubling news, however with how the Bretonian militant government has been operating it is understandable or foreseeable. As for your suggestion we will not be following it and instead doing the opposite. The Independent Worlds are important to the Cardamine trade as well as other operations and having Bretonia, or any major house, attempting to enforce their will is undesired. If anything, expect more from us, including the Light.
As for the Atum and it's battlegroup. When you say Crayter space, do you mean into the deeper Taus? If possible, we want to know where it went exactly. It's position matters. If it is indeed out of the way, then it's without worry. However if it still threatens the operations in the surrounding systems there must be action.